Running like crap.
Hello. I have a automatic 2001 is300 and it is running very terrible. The issue I am having is when the car is in park, it revs up to 3500 rpm. When it's in drive (with my foot on the break) it idles at around 800 rpm. When I take my foot off the gas and try and hit the acceleration a little bit I get nothing until maybe the last quarter of the acceleration travel. Also it will rev high in park then bog out and die for the first few turnovers. With a popping noise coming out of my air intake. And even my brakes are not working the greatest right now. I have changed quite a bit at this point. Valve cover seal, spark plugs, pcv valve, intake manifold gasket and both upstream o2 sensors. Nothing is working. Please help me.